The overall length of an assembled drum brake fork, from the center of the axle to the top of the extended fork tube (not including the top bolt) measures 727 mm in length.

The overall length of an assembled disc brake fork, from the center of the axle to the top of the extended fork tube (not including the top bolt) measures 738 mm in length. (Thanks to Jeff Buick who posted this information on the Yahoo! Loopframe_Guzzi news group.)